<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .father {
        width: 200px;
        height: 200px;
        background-color: pink;
        margin-top: 20px;
      }
      .son {
        width: 100px;
        height: 100px;
        background-color: skyblue;
      }
    </style>
  </head>
  <body>
    <div id="app">
      <h3>v-model修饰符 .trim .number</h3>
      姓名：<input v-model.trim="username" type="text" /><br />
      年纪：<input v-model.number="age" type="text" /><br />

      <h3>@事件名.stop → 阻止冒泡</h3>
      <div @click="fatherFn" class="father">
        <div @click.stop="sonFn" class="son">儿子</div>
      </div>

      <h3>@事件名.prevent → 阻止默认行为</h3>
      <a @click.prevent href="http://www.baidu.com">阻止默认行为</a>
    </div>
    <script src="./vue.js"></script>
    <script>
      const app = new Vue({
        el: '#app',
        data: {
          username: '',
          age: '',
        },
        methods: {
          fatherFn() {
            alert('老父亲被点击了');
          },
          sonFn() {
            alert('儿子被点击了');
          },
        },
      });
    </script>
  </body>
</html>
